Carbon dioxide separation and dry reforming of methane for synthesis of syngas by a dual‐phase membrane reactor

Abstract

in Wiley Online Library (wileyonlinelibrary.com) High-temperature CO 2 selective membranes offer potential for use to separate flue gas and produce a warm, pure CO 2 stream as a chemical feedstock. The coupling of separation of CO 2 by a ceramic-carbonate dual-phase membrane with dry reforming of CH 4 to produce syngas is reported. CO 2 permeation and the dry reforming reaction performance of the membrane reactor were experimentally studied with a CO 2 -N 2 mixture as the feed and CH 4 as the sweep gas passing through either an empty permeation chamber or one that was packed with a solid catalyst. CO 2 permeation flux through the membrane matches the rate of dry reforming of methane using a 10% Ni/c-alumina catalyst at temperatures above 750 C. At 850 C under the reaction conditions, the membrane reactor gives a CO 2 permeation flux of 0.17 mL min 21 cm 22, hydrogen production rate of 0.3 mL min 21 cm 22 with a H 2 to CO formation ratio of about 1, and conversion of CO 2 and CH 4 , respectively, of 88.5 and 8.1%.

Membrane reactors for hydrogen production from coal

“…The membrane module also demonstrated good long-term stability in actual coal-derived syngas streams with 320 ppm H 2 S. The polymeric membranes cannot be used at high temperatures. The membranes with reduced thickness prepared in tubular geometry (Dong, Ortiz-Landeros, & Lin, 2013) showed improved CO 2 permeance at temperatures above 800 K. Anderson and Lin (2013) demonstrated the use of such a dual-phase membrane for hydrogen (syngas) production by dry-reforming. The membranes permeate CO 2 with O 2 , but not other gases at temperatures above 700 K. However, the membranes are not stable because stainless steel can be oxidized and also reacts with molten carbonate.…”

Membrane reactors for dry reforming of methane

“…It was found that the carbon dioxide flux is independent by the composition and the flow rate of the sweep gas, while a certain dependency from temperature was found (Anderson & Lin, 2013). This value drops for the effect of the small leakage produced by eventual ceramic sealing at high temperature.…”

“…This value drops for the effect of the small leakage produced by eventual ceramic sealing at high temperature. Using this membrane in addition to an active catalyst (Ni-g Alumina), a conversion of 88% was achieved, with an equal concentration of carbon monoxide and hydrogen in the product, and no side reactions were observed (Anderson & Lin, 2013). In particular, the CO 2 flux increases with temperature owing to the rise of ionic conductivity, and this function can be described as an Arrhenius dependency with an activation energy of 100 kJ/mol (Anderson & Lin, 2013).…”

Chemical Waste and Allied Products

“…Reyero et al, (2013) configurations. Anderson and Lin (2013) reported that CO 2 permeation and the dry reforming reaction performance of the membrane reactor were experimentally studied with a CO 2 N 2 mixture as the feed and CH 4 as the sweep gas passing through either an empty permeation chamber or one that was packed with a solid catalyst.…”